Johnson Controls YVAHR072B32S, Installation And Maintenance Manual

Page: 15 / 88

P5417009-rev.6
9
• Flaring Dimension
Perform the flaring work as shown below.
• Joint Selection
If hard temper pipe is used, the flaring work cannot be performed. In this case, use a joint selected from
the table below. Do not use any other thin joint other than the ones shown in the table at left.
(
T
) It is impossible to perform flaring work
with hard temper pipe.
Use an accessory pipe with a flare.
inch (mm)
Diameter
(d)
A
+0
-0.02 (-0.4)
R410A
1/4 (6.35) 0.36 (9.1)
3/8 (9.52) 0.52 (13.2)
1/2 (12.7) 0.65 (16.6)
5/8 (15.88) 0.78 (19.7)
3/4 (19.05) (
T
)
Minimum Thickness of Joint
inch (mm)
Diameter R410A
1/4 (6.35) 0.020 (0.5)
3/8 (9.52) 0.024 (0.6)
1/2 (12.7) 0.028 (0.7)
5/8 (15.88) 0.031 (0.8)
3/4 (19.05) 0.031 (0.8)
7/8 (22.2) 0.035 (0.9)
1-1/8 (28.58) 0.039 (1.0)
1-3/8 (34.93) 0.047 (1.2)
1-5/8 (41.28) 0.057 (1.45)
3.3 Flaring and Joint
Flare Nut Dimension B
inch (mm)
Diameter R410A
1/4 (6.35) 11/16 (17)
3/8 (9.52) 7/8 (22)
1/2 (12.7) 1 (26)
5/8 (15.88) 1-1/8 (29)
3/4 (19.05) 1-7/16 (36)
NOTES:
• Do not use pipe that has allowable
pressure less than 601 psi (4.15MPa).
• The reference value of the refrigerant
piping thickness is indicated in the table
at left.
Do not use pipe that is considerably
different from the reference value.
B
Flare Nut
• Piping Thickness and Material
Use the pipe as described below.
The thickness of refrigerant pipe differs depending on design pressure.
For copper pipe, pay attention to pipe selection, because the piping thickness differs depending on its
material.
inch (mm)
Outer Diameter
R410A
Thickness Temper
1/4 (6.35) 0.03 (0.76) Annealed
3/8 (9.52) 0.032 (0.81) Annealed
1/2 (12.7) 0.032 (0.81) Annealed
5/8 (15.88) 0.035 (0.89) Annealed
3/4 (19.05) 0.035 (0.89) Hard Temper (or Annealed)
7/8 (22.2) 0.045 (1.14) Hard Temper
1-1/8 (28.58) 0.050 (1.27) Hard Temper
1-3/8 (34.93) 0.065 (1.65) Hard Temper
1-5/8 (41.28) 0.072 (1.83) Hard Temper
1/64 ~ 1/32R
A
d
90
o
+ 2
o
45
o + 2
o